Self-Sealing Porous Plastic - Fact or Fiction?

Have you heard the term “self-sealing” porous plastic used as a design option for a venting of filtering application?  The material is used in a variety of applications from pipette tip filters, to catheter vents, to hospital suction canister valves.  Yet, in all of these applications – the pores that are located in the porous plastic that never actually seal. So why are these parts referenced with the name “self-sealing” porous plastic?  Well, we’ll answer this question and more in this five minutes segment.

Adsorptive Filtration: Chemisorption & Physisorption

What do you get when you combine one part diffusion filtration, one part chemisorptive filtration, and one part physisorptive filtration? Adsorptive Filtration, of course. Puzzled? Tune in to find out what's going on behind the scenes, and learn how active sorbent surface area can make or beak your filtration efficiency.

Capillary Systems (Video 1 of 4): Polar molecules

Do you ever wonder why a paper towel soaks up water? Do you ever wonder why a ski jacket responds in an entirely opposite way to water by keeping water out while still permitting air exchange from one side of the material to the other? Well, these are just a few of the questions that you will be answer at the completion of this four part video tutorial.

Capillary Systems (Video 2 of 4): Surface Energy/Contact Angle

In the first segment of this series, we described a water molecule as a  molecule bearing a positive and a negative side.  In this second segment, we’ll build upon that knowledge to explain surface energy and contact angle.

Capillary Systems (Video 3 of 4): Capillary Tube

In the first two segments of this series, we described the water molecule as a polar molecule. We also discussed the contact angle that a water droplet forms when placed into contact with another material. Now, let’s apply these basic material science fundamentals to a capillary.

Capillary Systems (Video 4 of 4): Capillary Force Formula

In the first three segments of this series, we described the water molecule as a polar molecule. We also discussed the contact angle that a water droplet forms when placed into contact with a capillary. To conclude our four part tutorial, we'll introduce the capillary equation in order to better predict the response of a capillary system.

Filtration (Video 1 of 2): Filtration Capture Mechanisms

Are you in the midst of properly sizing a filter media for your air or liquid filtration application?  Do you know which particle size stands the best chance of compromising your system by making its way through your filter?  That particle is referred to as the most penetrating particle size and it can create havoc if your not careful.  But, if you’re aware of the most penetrating particle size then you can design and optimize your filter’s performance for hassle free operation.

Filtration (Video 2 of 2): Most Penetrating Particle Size

For every given filtration application, there exists a particle size that is the most difficult to filter or capture.  This particle size, commonly referred to as the most penetrating particle size, is least affected by filtration capture mechanisms.  You might wonder, "Why is this the case and how can you use this information to better select a filter media for your specific application?"  We’ll answer these questions in this second of our two part video series. 

Filtration Specification Guidelines

In this six minute video the makeup of a properly defined filtration specification is presented. First we’ll introduce the three basic components of the specification. Then, we’ll briefly describe and explain each component. Lastly, we’ll put them all together to demonstrate their combination into a singular filtration specification.

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